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[dwm.git] / dwm.c
1 /* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * The event handlers of dwm are organized in an array which is accessed
10 * whenever a new event has been fetched. This allows event dispatching
11 * in O(1) time.
12 *
13 * Each child of the root window is called a client, except windows which have
14 * set the override_redirect flag. Clients are organized in a linked client
15 * list on each monitor, the focus history is remembered through a stack list
16 * on each monitor. Each client contains a bit array to indicate the tags of a
17 * client.
18 *
19 * Keys and tagging rules are organized as arrays and defined in config.h.
20 *
21 * To understand everything else, start reading main().
22 */
23 #include <errno.h>
24 #include <locale.h>
25 #include <stdarg.h>
26 #include <signal.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <unistd.h>
31 #include <sys/types.h>
32 #include <sys/wait.h>
33 #include <X11/cursorfont.h>
34 #include <X11/keysym.h>
35 #include <X11/Xatom.h>
36 #include <X11/Xlib.h>
37 #include <X11/Xproto.h>
38 #include <X11/Xutil.h>
39 #ifdef XINERAMA
40 #include <X11/extensions/Xinerama.h>
41 #endif /* XINERAMA */
42
43 /* macros */
44 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
45 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
46 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
47 #define ISVISIBLE(C) ((C->tags & C->mon->tagset[C->mon->seltags]))
48 #define LENGTH(X) (sizeof X / sizeof X[0])
49 #define MAX(A, B) ((A) > (B) ? (A) : (B))
50 #define MIN(A, B) ((A) < (B) ? (A) : (B))
51 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
52 #define WIDTH(X) ((X)->w + 2 * (X)->bw)
53 #define HEIGHT(X) ((X)->h + 2 * (X)->bw)
54 #define TAGMASK ((1 << LENGTH(tags)) - 1)
55 #define TEXTW(X) (textnw(X, strlen(X)) + dc.font.height)
56
57 /* enums */
58 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
59 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
60 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
61 enum { WMProtocols, WMDelete, WMState, WMLast }; /* default atoms */
62 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
63 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
64
65 typedef union {
66 int i;
67 unsigned int ui;
68 float f;
69 const void *v;
70 } Arg;
71
72 typedef struct {
73 unsigned int click;
74 unsigned int mask;
75 unsigned int button;
76 void (*func)(const Arg *arg);
77 const Arg arg;
78 } Button;
79
80 typedef struct Monitor Monitor;
81 typedef struct Client Client;
82 struct Client {
83 char name[256];
84 float mina, maxa;
85 int x, y, w, h;
86 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
87 int bw, oldbw;
88 unsigned int tags;
89 Bool isfixed, isfloating, isurgent;
90 Client *next;
91 Client *snext;
92 Monitor *mon;
93 Window win;
94 };
95
96 typedef struct {
97 int x, y, w, h;
98 unsigned long norm[ColLast];
99 unsigned long sel[ColLast];
100 Drawable drawable;
101 GC gc;
102 struct {
103 int ascent;
104 int descent;
105 int height;
106 XFontSet set;
107 XFontStruct *xfont;
108 } font;
109 } DC; /* draw context */
110
111 typedef struct {
112 unsigned int mod;
113 KeySym keysym;
114 void (*func)(const Arg *);
115 const Arg arg;
116 } Key;
117
118 typedef struct {
119 const char *symbol;
120 void (*arrange)(Monitor *);
121 } Layout;
122
123 struct Monitor {
124 char ltsymbol[16];
125 float mfact;
126 int num;
127 int by; /* bar geometry */
128 int mx, my, mw, mh; /* screen size */
129 int wx, wy, ww, wh; /* window area */
130 unsigned int seltags;
131 unsigned int sellt;
132 unsigned int tagset[2];
133 Bool showbar;
134 Bool topbar;
135 Client *clients;
136 Client *sel;
137 Client *stack;
138 Monitor *next;
139 Window barwin;
140 const Layout *lt[2];
141 };
142
143 typedef struct {
144 const char *class;
145 const char *instance;
146 const char *title;
147 unsigned int tags;
148 Bool isfloating;
149 int monitor;
150 } Rule;
151
152 /* function declarations */
153 static void applyrules(Client *c);
154 static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact);
155 static void arrange(void);
156 static void attach(Client *c);
157 static void attachstack(Client *c);
158 static void buttonpress(XEvent *e);
159 static void checkotherwm(void);
160 static void cleanup(void);
161 static void cleanupmons(void);
162 static void clearurgent(Client *c);
163 static void configure(Client *c);
164 static void configurenotify(XEvent *e);
165 static void configurerequest(XEvent *e);
166 static Monitor *createmon(void);
167 static void destroynotify(XEvent *e);
168 static void detach(Client *c);
169 static void detachstack(Client *c);
170 static void die(const char *errstr, ...);
171 static Monitor *dirtomon(int dir);
172 static void drawbar(Monitor *m);
173 static void drawbars(void);
174 static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
175 static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
176 static void enternotify(XEvent *e);
177 static void expose(XEvent *e);
178 static void focus(Client *c);
179 static void focusin(XEvent *e);
180 static void focusmon(const Arg *arg);
181 static void focusstack(const Arg *arg);
182 static unsigned long getcolor(const char *colstr);
183 static Bool getrootptr(int *x, int *y);
184 static long getstate(Window w);
185 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
186 static void grabbuttons(Client *c, Bool focused);
187 static void grabkeys(void);
188 static void initfont(const char *fontstr);
189 static Bool isprotodel(Client *c);
190 static void keypress(XEvent *e);
191 static void killclient(const Arg *arg);
192 static void manage(Window w, XWindowAttributes *wa);
193 static void mappingnotify(XEvent *e);
194 static void maprequest(XEvent *e);
195 static void monocle(Monitor *m);
196 static void movemouse(const Arg *arg);
197 static Client *nexttiled(Client *c);
198 static Monitor *ptrtomon(int x, int y);
199 static void propertynotify(XEvent *e);
200 static void quit(const Arg *arg);
201 static void resize(Client *c, int x, int y, int w, int h, Bool interact);
202 static void resizemouse(const Arg *arg);
203 static void restack(Monitor *m);
204 static void run(void);
205 static void scan(void);
206 static void sendmon(Client *c, Monitor *m);
207 static void setclientstate(Client *c, long state);
208 static void setlayout(const Arg *arg);
209 static void setmfact(const Arg *arg);
210 static void setup(void);
211 static void showhide(Client *c);
212 static void sigchld(int unused);
213 static void spawn(const Arg *arg);
214 static void tag(const Arg *arg);
215 static void tagmon(const Arg *arg);
216 static int textnw(const char *text, unsigned int len);
217 static void tile(Monitor *);
218 static void togglebar(const Arg *arg);
219 static void togglefloating(const Arg *arg);
220 static void toggletag(const Arg *arg);
221 static void toggleview(const Arg *arg);
222 static void unfocus(Client *c);
223 static void unmanage(Client *c, Bool destroyed);
224 static void unmapnotify(XEvent *e);
225 static Bool updategeom(void);
226 static void updatebarpos(Monitor *m);
227 static void updatebars(void);
228 static void updatenumlockmask(void);
229 static void updatesizehints(Client *c);
230 static void updatestatus(void);
231 static void updatetitle(Client *c);
232 static void updatewmhints(Client *c);
233 static void view(const Arg *arg);
234 static Client *wintoclient(Window w);
235 static Monitor *wintomon(Window w);
236 static int xerror(Display *dpy, XErrorEvent *ee);
237 static int xerrordummy(Display *dpy, XErrorEvent *ee);
238 static int xerrorstart(Display *dpy, XErrorEvent *ee);
239 static void zoom(const Arg *arg);
240
241 /* variables */
242 static const char broken[] = "broken";
243 static char stext[256];
244 static int screen;
245 static int sw, sh; /* X display screen geometry width, height */
246 static int bh, blw = 0; /* bar geometry */
247 static int (*xerrorxlib)(Display *, XErrorEvent *);
248 static unsigned int numlockmask = 0;
249 static void (*handler[LASTEvent]) (XEvent *) = {
250 [ButtonPress] = buttonpress,
251 [ConfigureRequest] = configurerequest,
252 [ConfigureNotify] = configurenotify,
253 [DestroyNotify] = destroynotify,
254 [EnterNotify] = enternotify,
255 [Expose] = expose,
256 [FocusIn] = focusin,
257 [KeyPress] = keypress,
258 [MappingNotify] = mappingnotify,
259 [MapRequest] = maprequest,
260 [PropertyNotify] = propertynotify,
261 [UnmapNotify] = unmapnotify
262 };
263 static Atom wmatom[WMLast], netatom[NetLast];
264 static Bool otherwm;
265 static Bool running = True;
266 static Cursor cursor[CurLast];
267 static Display *dpy;
268 static DC dc;
269 static Monitor *mons = NULL, *selmon = NULL;
270 static Window root;
271
272 /* configuration, allows nested code to access above variables */
273 #include "config.h"
274
275 /* compile-time check if all tags fit into an unsigned int bit array. */
276 struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
277
278 /* function implementations */
279 void
280 applyrules(Client *c) {
281 const char *class, *instance;
282 unsigned int i;
283 const Rule *r;
284 Monitor *m;
285 XClassHint ch = { 0 };
286
287 /* rule matching */
288 c->isfloating = c->tags = 0;
289 if(XGetClassHint(dpy, c->win, &ch)) {
290 class = ch.res_class ? ch.res_class : broken;
291 instance = ch.res_name ? ch.res_name : broken;
292 for(i = 0; i < LENGTH(rules); i++) {
293 r = &rules[i];
294 if((!r->title || strstr(c->name, r->title))
295 && (!r->class || strstr(class, r->class))
296 && (!r->instance || strstr(instance, r->instance)))
297 {
298 c->isfloating = r->isfloating;
299 c->tags |= r->tags;
300 for(m = mons; m && m->num != r->monitor; m = m->next);
301 if(m)
302 c->mon = m;
303 }
304 }
305 if(ch.res_class)
306 XFree(ch.res_class);
307 if(ch.res_name)
308 XFree(ch.res_name);
309 }
310 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
311 }
312
313 Bool
314 applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact) {
315 Bool baseismin;
316 Monitor *m = c->mon;
317
318 /* set minimum possible */
319 *w = MAX(1, *w);
320 *h = MAX(1, *h);
321 if(interact) {
322 if(*x > sw)
323 *x = sw - WIDTH(c);
324 if(*y > sh)
325 *y = sh - HEIGHT(c);
326 if(*x + *w + 2 * c->bw < 0)
327 *x = 0;
328 if(*y + *h + 2 * c->bw < 0)
329 *y = 0;
330 }
331 else {
332 if(*x > m->mx + m->mw)
333 *x = m->mx + m->mw - WIDTH(c);
334 if(*y > m->my + m->mh)
335 *y = m->my + m->mh - HEIGHT(c);
336 if(*x + *w + 2 * c->bw < m->mx)
337 *x = m->mx;
338 if(*y + *h + 2 * c->bw < m->my)
339 *y = m->my;
340 }
341 if(*h < bh)
342 *h = bh;
343 if(*w < bh)
344 *w = bh;
345 if(resizehints || c->isfloating) {
346 /* see last two sentences in ICCCM 4.1.2.3 */
347 baseismin = c->basew == c->minw && c->baseh == c->minh;
348 if(!baseismin) { /* temporarily remove base dimensions */
349 *w -= c->basew;
350 *h -= c->baseh;
351 }
352 /* adjust for aspect limits */
353 if(c->mina > 0 && c->maxa > 0) {
354 if(c->maxa < (float)*w / *h)
355 *w = *h * c->maxa + 0.5;
356 else if(c->mina < (float)*h / *w)
357 *h = *w * c->mina + 0.5;
358 }
359 if(baseismin) { /* increment calculation requires this */
360 *w -= c->basew;
361 *h -= c->baseh;
362 }
363 /* adjust for increment value */
364 if(c->incw)
365 *w -= *w % c->incw;
366 if(c->inch)
367 *h -= *h % c->inch;
368 /* restore base dimensions */
369 *w += c->basew;
370 *h += c->baseh;
371 *w = MAX(*w, c->minw);
372 *h = MAX(*h, c->minh);
373 if(c->maxw)
374 *w = MIN(*w, c->maxw);
375 if(c->maxh)
376 *h = MIN(*h, c->maxh);
377 }
378 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
379 }
380
381 void
382 arrange(void) {
383 Monitor *m;
384
385 for(m = mons; m; m = m->next)
386 showhide(m->stack);
387 focus(NULL);
388 for(m = mons; m; m = m->next) {
389 strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
390 if(m->lt[m->sellt]->arrange)
391 m->lt[m->sellt]->arrange(m);
392 restack(m);
393 }
394 }
395
396 void
397 attach(Client *c) {
398 c->next = c->mon->clients;
399 c->mon->clients = c;
400 }
401
402 void
403 attachstack(Client *c) {
404 c->snext = c->mon->stack;
405 c->mon->stack = c;
406 }
407
408 void
409 buttonpress(XEvent *e) {
410 unsigned int i, x, click;
411 Arg arg = {0};
412 Client *c;
413 Monitor *m;
414 XButtonPressedEvent *ev = &e->xbutton;
415
416 click = ClkRootWin;
417 /* focus monitor if necessary */
418 if((m = wintomon(ev->window)) && m != selmon) {
419 unfocus(selmon->sel);
420 selmon = m;
421 focus(NULL);
422 }
423 if(ev->window == selmon->barwin) {
424 i = x = 0;
425 do {
426 x += TEXTW(tags[i]);
427 } while(ev->x >= x && ++i < LENGTH(tags));
428 if(i < LENGTH(tags)) {
429 click = ClkTagBar;
430 arg.ui = 1 << i;
431 }
432 else if(ev->x < x + blw)
433 click = ClkLtSymbol;
434 else if(ev->x > selmon->wx + selmon->ww - TEXTW(stext))
435 click = ClkStatusText;
436 else
437 click = ClkWinTitle;
438 }
439 else if((c = wintoclient(ev->window))) {
440 focus(c);
441 click = ClkClientWin;
442 }
443 for(i = 0; i < LENGTH(buttons); i++)
444 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
445 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
446 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
447 }
448
449 void
450 checkotherwm(void) {
451 otherwm = False;
452 xerrorxlib = XSetErrorHandler(xerrorstart);
453 /* this causes an error if some other window manager is running */
454 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
455 XSync(dpy, False);
456 if(otherwm)
457 die("dwm: another window manager is already running\n");
458 XSetErrorHandler(xerror);
459 XSync(dpy, False);
460 }
461
462 void
463 cleanup(void) {
464 Arg a = {.ui = ~0};
465 Layout foo = { "", NULL };
466 Monitor *m;
467
468 view(&a);
469 selmon->lt[selmon->sellt] = &foo;
470 for(m = mons; m; m = m->next)
471 while(m->stack)
472 unmanage(m->stack, False);
473 if(dc.font.set)
474 XFreeFontSet(dpy, dc.font.set);
475 else
476 XFreeFont(dpy, dc.font.xfont);
477 XUngrabKey(dpy, AnyKey, AnyModifier, root);
478 XFreePixmap(dpy, dc.drawable);
479 XFreeGC(dpy, dc.gc);
480 XFreeCursor(dpy, cursor[CurNormal]);
481 XFreeCursor(dpy, cursor[CurResize]);
482 XFreeCursor(dpy, cursor[CurMove]);
483 cleanupmons();
484 XSync(dpy, False);
485 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
486 }
487
488 void
489 cleanupmons(void) {
490 Monitor *m;
491
492 while(mons) {
493 m = mons->next;
494 XUnmapWindow(dpy, mons->barwin);
495 XDestroyWindow(dpy, mons->barwin);
496 free(mons);
497 mons = m;
498 }
499 }
500
501 void
502 clearurgent(Client *c) {
503 XWMHints *wmh;
504
505 c->isurgent = False;
506 if(!(wmh = XGetWMHints(dpy, c->win)))
507 return;
508 wmh->flags &= ~XUrgencyHint;
509 XSetWMHints(dpy, c->win, wmh);
510 XFree(wmh);
511 }
512
513 void
514 configure(Client *c) {
515 XConfigureEvent ce;
516
517 ce.type = ConfigureNotify;
518 ce.display = dpy;
519 ce.event = c->win;
520 ce.window = c->win;
521 ce.x = c->x;
522 ce.y = c->y;
523 ce.width = c->w;
524 ce.height = c->h;
525 ce.border_width = c->bw;
526 ce.above = None;
527 ce.override_redirect = False;
528 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
529 }
530
531 void
532 configurenotify(XEvent *e) {
533 Monitor *m;
534 XConfigureEvent *ev = &e->xconfigure;
535
536 if(ev->window == root) {
537 sw = ev->width;
538 sh = ev->height;
539 if(updategeom()) {
540 if(dc.drawable != 0)
541 XFreePixmap(dpy, dc.drawable);
542 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
543 updatebars();
544 for(m = mons; m; m = m->next)
545 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
546 arrange();
547 }
548 }
549 }
550
551 void
552 configurerequest(XEvent *e) {
553 Client *c;
554 Monitor *m;
555 XConfigureRequestEvent *ev = &e->xconfigurerequest;
556 XWindowChanges wc;
557
558 if((c = wintoclient(ev->window))) {
559 if(ev->value_mask & CWBorderWidth)
560 c->bw = ev->border_width;
561 else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
562 m = c->mon;
563 if(ev->value_mask & CWX)
564 c->x = m->mx + ev->x;
565 if(ev->value_mask & CWY)
566 c->y = m->my + ev->y;
567 if(ev->value_mask & CWWidth)
568 c->w = ev->width;
569 if(ev->value_mask & CWHeight)
570 c->h = ev->height;
571 if((c->x + c->w) > m->mx + m->mw && c->isfloating)
572 c->x = m->mx + (m->mw / 2 - c->w / 2); /* center in x direction */
573 if((c->y + c->h) > m->my + m->mh && c->isfloating)
574 c->y = m->my + (m->mh / 2 - c->h / 2); /* center in y direction */
575 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
576 configure(c);
577 if(ISVISIBLE(c))
578 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
579 }
580 else
581 configure(c);
582 }
583 else {
584 wc.x = ev->x;
585 wc.y = ev->y;
586 wc.width = ev->width;
587 wc.height = ev->height;
588 wc.border_width = ev->border_width;
589 wc.sibling = ev->above;
590 wc.stack_mode = ev->detail;
591 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
592 }
593 XSync(dpy, False);
594 }
595
596 Monitor *
597 createmon(void) {
598 Monitor *m;
599
600 if(!(m = (Monitor *)calloc(1, sizeof(Monitor))))
601 die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
602 m->tagset[0] = m->tagset[1] = 1;
603 m->mfact = mfact;
604 m->showbar = showbar;
605 m->topbar = topbar;
606 m->lt[0] = &layouts[0];
607 m->lt[1] = &layouts[1 % LENGTH(layouts)];
608 strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
609 return m;
610 }
611
612 void
613 destroynotify(XEvent *e) {
614 Client *c;
615 XDestroyWindowEvent *ev = &e->xdestroywindow;
616
617 if((c = wintoclient(ev->window)))
618 unmanage(c, True);
619 }
620
621 void
622 detach(Client *c) {
623 Client **tc;
624
625 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
626 *tc = c->next;
627 }
628
629 void
630 detachstack(Client *c) {
631 Client **tc, *t;
632
633 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
634 *tc = c->snext;
635
636 if(c == c->mon->sel) {
637 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
638 c->mon->sel = t;
639 }
640 }
641
642 void
643 die(const char *errstr, ...) {
644 va_list ap;
645
646 va_start(ap, errstr);
647 vfprintf(stderr, errstr, ap);
648 va_end(ap);
649 exit(EXIT_FAILURE);
650 }
651
652 Monitor *
653 dirtomon(int dir) {
654 Monitor *m = NULL;
655
656 if(dir > 0) {
657 if(!(m = selmon->next))
658 m = mons;
659 }
660 else {
661 if(selmon == mons)
662 for(m = mons; m->next; m = m->next);
663 else
664 for(m = mons; m->next != selmon; m = m->next);
665 }
666 return m;
667 }
668
669 void
670 drawbar(Monitor *m) {
671 int x;
672 unsigned int i, occ = 0, urg = 0;
673 unsigned long *col;
674 Client *c;
675
676 for(c = m->clients; c; c = c->next) {
677 occ |= c->tags;
678 if(c->isurgent)
679 urg |= c->tags;
680 }
681 dc.x = 0;
682 for(i = 0; i < LENGTH(tags); i++) {
683 dc.w = TEXTW(tags[i]);
684 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
685 drawtext(tags[i], col, urg & 1 << i);
686 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
687 occ & 1 << i, urg & 1 << i, col);
688 dc.x += dc.w;
689 }
690 dc.w = blw = TEXTW(m->ltsymbol);
691 drawtext(m->ltsymbol, dc.norm, False);
692 dc.x += dc.w;
693 x = dc.x;
694 if(m == selmon) { /* status is only drawn on selected monitor */
695 dc.w = TEXTW(stext);
696 dc.x = m->ww - dc.w;
697 if(dc.x < x) {
698 dc.x = x;
699 dc.w = m->ww - x;
700 }
701 drawtext(stext, dc.norm, False);
702 }
703 else
704 dc.x = m->ww;
705 if((dc.w = dc.x - x) > bh) {
706 dc.x = x;
707 if(m->sel) {
708 col = m == selmon ? dc.sel : dc.norm;
709 drawtext(m->sel->name, col, False);
710 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
711 }
712 else
713 drawtext(NULL, dc.norm, False);
714 }
715 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
716 XSync(dpy, False);
717 }
718
719 void
720 drawbars(void) {
721 Monitor *m;
722
723 for(m = mons; m; m = m->next)
724 drawbar(m);
725 }
726
727 void
728 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
729 int x;
730 XGCValues gcv;
731 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
732
733 gcv.foreground = col[invert ? ColBG : ColFG];
734 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
735 x = (dc.font.ascent + dc.font.descent + 2) / 4;
736 r.x = dc.x + 1;
737 r.y = dc.y + 1;
738 if(filled) {
739 r.width = r.height = x + 1;
740 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
741 }
742 else if(empty) {
743 r.width = r.height = x;
744 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
745 }
746 }
747
748 void
749 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
750 char buf[256];
751 int i, x, y, h, len, olen;
752 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
753
754 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
755 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
756 if(!text)
757 return;
758 olen = strlen(text);
759 h = dc.font.ascent + dc.font.descent;
760 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
761 x = dc.x + (h / 2);
762 /* shorten text if necessary */
763 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
764 if(!len)
765 return;
766 memcpy(buf, text, len);
767 if(len < olen)
768 for(i = len; i && i > len - 3; buf[--i] = '.');
769 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
770 if(dc.font.set)
771 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
772 else
773 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
774 }
775
776 void
777 enternotify(XEvent *e) {
778 Client *c;
779 Monitor *m;
780 XCrossingEvent *ev = &e->xcrossing;
781
782 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
783 return;
784 if((m = wintomon(ev->window)) && m != selmon) {
785 unfocus(selmon->sel);
786 selmon = m;
787 }
788 if((c = wintoclient(ev->window)))
789 focus(c);
790 else
791 focus(NULL);
792 }
793
794 void
795 expose(XEvent *e) {
796 Monitor *m;
797 XExposeEvent *ev = &e->xexpose;
798
799 if(ev->count == 0 && (m = wintomon(ev->window)))
800 drawbar(m);
801 }
802
803 void
804 focus(Client *c) {
805 if(!c || !ISVISIBLE(c))
806 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
807 if(selmon->sel)
808 unfocus(selmon->sel);
809 if(c) {
810 if(c->mon != selmon)
811 selmon = c->mon;
812 if(c->isurgent)
813 clearurgent(c);
814 detachstack(c);
815 attachstack(c);
816 grabbuttons(c, True);
817 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
818 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
819 }
820 else
821 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
822 selmon->sel = c;
823 drawbars();
824 }
825
826 void
827 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
828 XFocusChangeEvent *ev = &e->xfocus;
829
830 if(selmon->sel && ev->window != selmon->sel->win)
831 XSetInputFocus(dpy, selmon->sel->win, RevertToPointerRoot, CurrentTime);
832 }
833
834 void
835 focusmon(const Arg *arg) {
836 Monitor *m = NULL;
837
838 if(!mons->next)
839 return;
840 m = dirtomon(arg->i);
841 unfocus(selmon->sel);
842 selmon = m;
843 focus(NULL);
844 }
845
846 void
847 focusstack(const Arg *arg) {
848 Client *c = NULL, *i;
849
850 if(!selmon->sel)
851 return;
852 if(arg->i > 0) {
853 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
854 if(!c)
855 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
856 }
857 else {
858 for(i = selmon->clients; i != selmon->sel; i = i->next)
859 if(ISVISIBLE(i))
860 c = i;
861 if(!c)
862 for(; i; i = i->next)
863 if(ISVISIBLE(i))
864 c = i;
865 }
866 if(c) {
867 focus(c);
868 restack(selmon);
869 }
870 }
871
872 unsigned long
873 getcolor(const char *colstr) {
874 Colormap cmap = DefaultColormap(dpy, screen);
875 XColor color;
876
877 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
878 die("error, cannot allocate color '%s'\n", colstr);
879 return color.pixel;
880 }
881
882 Bool
883 getrootptr(int *x, int *y) {
884 int di;
885 unsigned int dui;
886 Window dummy;
887
888 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
889 }
890
891 long
892 getstate(Window w) {
893 int format, status;
894 long result = -1;
895 unsigned char *p = NULL;
896 unsigned long n, extra;
897 Atom real;
898
899 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
900 &real, &format, &n, &extra, (unsigned char **)&p);
901 if(status != Success)
902 return -1;
903 if(n != 0)
904 result = *p;
905 XFree(p);
906 return result;
907 }
908
909 Bool
910 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
911 char **list = NULL;
912 int n;
913 XTextProperty name;
914
915 if(!text || size == 0)
916 return False;
917 text[0] = '\0';
918 XGetTextProperty(dpy, w, &name, atom);
919 if(!name.nitems)
920 return False;
921 if(name.encoding == XA_STRING)
922 strncpy(text, (char *)name.value, size - 1);
923 else {
924 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
925 strncpy(text, *list, size - 1);
926 XFreeStringList(list);
927 }
928 }
929 text[size - 1] = '\0';
930 XFree(name.value);
931 return True;
932 }
933
934 void
935 grabbuttons(Client *c, Bool focused) {
936 updatenumlockmask();
937 {
938 unsigned int i, j;
939 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
940 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
941 if(focused) {
942 for(i = 0; i < LENGTH(buttons); i++)
943 if(buttons[i].click == ClkClientWin)
944 for(j = 0; j < LENGTH(modifiers); j++)
945 XGrabButton(dpy, buttons[i].button,
946 buttons[i].mask | modifiers[j],
947 c->win, False, BUTTONMASK,
948 GrabModeAsync, GrabModeSync, None, None);
949 }
950 else
951 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
952 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
953 }
954 }
955
956 void
957 grabkeys(void) {
958 updatenumlockmask();
959 {
960 unsigned int i, j;
961 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
962 KeyCode code;
963
964 XUngrabKey(dpy, AnyKey, AnyModifier, root);
965 for(i = 0; i < LENGTH(keys); i++) {
966 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
967 for(j = 0; j < LENGTH(modifiers); j++)
968 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
969 True, GrabModeAsync, GrabModeAsync);
970 }
971 }
972 }
973
974 void
975 initfont(const char *fontstr) {
976 char *def, **missing;
977 int i, n;
978
979 missing = NULL;
980 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
981 if(missing) {
982 while(n--)
983 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
984 XFreeStringList(missing);
985 }
986 if(dc.font.set) {
987 XFontSetExtents *font_extents;
988 XFontStruct **xfonts;
989 char **font_names;
990
991 dc.font.ascent = dc.font.descent = 0;
992 font_extents = XExtentsOfFontSet(dc.font.set);
993 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
994 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
995 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
996 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
997 xfonts++;
998 }
999 }
1000 else {
1001 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
1002 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
1003 die("error, cannot load font: '%s'\n", fontstr);
1004 dc.font.ascent = dc.font.xfont->ascent;
1005 dc.font.descent = dc.font.xfont->descent;
1006 }
1007 dc.font.height = dc.font.ascent + dc.font.descent;
1008 }
1009
1010 Bool
1011 isprotodel(Client *c) {
1012 int i, n;
1013 Atom *protocols;
1014 Bool ret = False;
1015
1016 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1017 for(i = 0; !ret && i < n; i++)
1018 if(protocols[i] == wmatom[WMDelete])
1019 ret = True;
1020 XFree(protocols);
1021 }
1022 return ret;
1023 }
1024
1025 #ifdef XINERAMA
1026 static Bool
1027 isuniquegeom(XineramaScreenInfo *unique, size_t len, XineramaScreenInfo *info) {
1028 unsigned int i;
1029
1030 for(i = 0; i < len; i++)
1031 if(unique[i].x_org == info->x_org && unique[i].y_org == info->y_org
1032 && unique[i].width == info->width && unique[i].height == info->height)
1033 return False;
1034 return True;
1035 }
1036 #endif /* XINERAMA */
1037
1038 void
1039 keypress(XEvent *e) {
1040 unsigned int i;
1041 KeySym keysym;
1042 XKeyEvent *ev;
1043
1044 ev = &e->xkey;
1045 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1046 for(i = 0; i < LENGTH(keys); i++)
1047 if(keysym == keys[i].keysym
1048 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1049 && keys[i].func)
1050 keys[i].func(&(keys[i].arg));
1051 }
1052
1053 void
1054 killclient(const Arg *arg) {
1055 XEvent ev;
1056
1057 if(!selmon->sel)
1058 return;
1059 if(isprotodel(selmon->sel)) {
1060 ev.type = ClientMessage;
1061 ev.xclient.window = selmon->sel->win;
1062 ev.xclient.message_type = wmatom[WMProtocols];
1063 ev.xclient.format = 32;
1064 ev.xclient.data.l[0] = wmatom[WMDelete];
1065 ev.xclient.data.l[1] = CurrentTime;
1066 XSendEvent(dpy, selmon->sel->win, False, NoEventMask, &ev);
1067 }
1068 else {
1069 XGrabServer(dpy);
1070 XSetErrorHandler(xerrordummy);
1071 XSetCloseDownMode(dpy, DestroyAll);
1072 XKillClient(dpy, selmon->sel->win);
1073 XSync(dpy, False);
1074 XSetErrorHandler(xerror);
1075 XUngrabServer(dpy);
1076 }
1077 }
1078
1079 void
1080 manage(Window w, XWindowAttributes *wa) {
1081 static Client cz;
1082 Client *c, *t = NULL;
1083 Window trans = None;
1084 XWindowChanges wc;
1085
1086 if(!(c = malloc(sizeof(Client))))
1087 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1088 *c = cz;
1089 c->win = w;
1090 updatetitle(c);
1091 if(XGetTransientForHint(dpy, w, &trans))
1092 t = wintoclient(trans);
1093 if(t) {
1094 c->mon = t->mon;
1095 c->tags = t->tags;
1096 }
1097 else {
1098 c->mon = selmon;
1099 applyrules(c);
1100 }
1101 /* geometry */
1102 c->x = wa->x + c->mon->wx;
1103 c->y = wa->y + c->mon->wy;
1104 c->w = wa->width;
1105 c->h = wa->height;
1106 c->oldbw = wa->border_width;
1107 if(c->w == c->mon->mw && c->h == c->mon->mh) {
1108 c->x = c->mon->mx;
1109 c->y = c->mon->my;
1110 c->bw = 0;
1111 }
1112 else {
1113 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1114 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1115 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1116 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1117 c->x = MAX(c->x, c->mon->mx);
1118 /* only fix client y-offset, if the client center might cover the bar */
1119 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1120 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1121 c->bw = borderpx;
1122 }
1123 wc.border_width = c->bw;
1124 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1125 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1126 configure(c); /* propagates border_width, if size doesn't change */
1127 updatesizehints(c);
1128 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1129 grabbuttons(c, False);
1130 if(!c->isfloating)
1131 c->isfloating = trans != None || c->isfixed;
1132 if(c->isfloating)
1133 XRaiseWindow(dpy, c->win);
1134 attach(c);
1135 attachstack(c);
1136 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1137 XMapWindow(dpy, c->win);
1138 setclientstate(c, NormalState);
1139 arrange();
1140 }
1141
1142 void
1143 mappingnotify(XEvent *e) {
1144 XMappingEvent *ev = &e->xmapping;
1145
1146 XRefreshKeyboardMapping(ev);
1147 if(ev->request == MappingKeyboard)
1148 grabkeys();
1149 }
1150
1151 void
1152 maprequest(XEvent *e) {
1153 static XWindowAttributes wa;
1154 XMapRequestEvent *ev = &e->xmaprequest;
1155
1156 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1157 return;
1158 if(wa.override_redirect)
1159 return;
1160 if(!wintoclient(ev->window))
1161 manage(ev->window, &wa);
1162 }
1163
1164 void
1165 monocle(Monitor *m) {
1166 unsigned int n = 0;
1167 Client *c;
1168
1169 for(c = m->clients; c; c = c->next)
1170 if(ISVISIBLE(c))
1171 n++;
1172 if(n > 0) /* override layout symbol */
1173 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1174 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1175 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1176 }
1177
1178 void
1179 movemouse(const Arg *arg) {
1180 int x, y, ocx, ocy, nx, ny;
1181 Client *c;
1182 Monitor *m;
1183 XEvent ev;
1184
1185 if(!(c = selmon->sel))
1186 return;
1187 restack(selmon);
1188 ocx = c->x;
1189 ocy = c->y;
1190 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1191 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1192 return;
1193 if(!getrootptr(&x, &y))
1194 return;
1195 do {
1196 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1197 switch (ev.type) {
1198 case ConfigureRequest:
1199 case Expose:
1200 case MapRequest:
1201 handler[ev.type](&ev);
1202 break;
1203 case MotionNotify:
1204 nx = ocx + (ev.xmotion.x - x);
1205 ny = ocy + (ev.xmotion.y - y);
1206 if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1207 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1208 if(abs(selmon->wx - nx) < snap)
1209 nx = selmon->wx;
1210 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1211 nx = selmon->wx + selmon->ww - WIDTH(c);
1212 if(abs(selmon->wy - ny) < snap)
1213 ny = selmon->wy;
1214 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1215 ny = selmon->wy + selmon->wh - HEIGHT(c);
1216 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1217 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1218 togglefloating(NULL);
1219 }
1220 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1221 resize(c, nx, ny, c->w, c->h, True);
1222 break;
1223 }
1224 } while(ev.type != ButtonRelease);
1225 XUngrabPointer(dpy, CurrentTime);
1226 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1227 sendmon(c, m);
1228 selmon = m;
1229 focus(NULL);
1230 }
1231 }
1232
1233 Client *
1234 nexttiled(Client *c) {
1235 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1236 return c;
1237 }
1238
1239 Monitor *
1240 ptrtomon(int x, int y) {
1241 Monitor *m;
1242
1243 for(m = mons; m; m = m->next)
1244 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1245 return m;
1246 return selmon;
1247 }
1248
1249 void
1250 propertynotify(XEvent *e) {
1251 Client *c;
1252 Window trans;
1253 XPropertyEvent *ev = &e->xproperty;
1254
1255 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1256 updatestatus();
1257 else if(ev->state == PropertyDelete)
1258 return; /* ignore */
1259 else if((c = wintoclient(ev->window))) {
1260 switch (ev->atom) {
1261 default: break;
1262 case XA_WM_TRANSIENT_FOR:
1263 XGetTransientForHint(dpy, c->win, &trans);
1264 if(!c->isfloating && (c->isfloating = (wintoclient(trans) != NULL)))
1265 arrange();
1266 break;
1267 case XA_WM_NORMAL_HINTS:
1268 updatesizehints(c);
1269 break;
1270 case XA_WM_HINTS:
1271 updatewmhints(c);
1272 drawbars();
1273 break;
1274 }
1275 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1276 updatetitle(c);
1277 if(c == c->mon->sel)
1278 drawbar(c->mon);
1279 }
1280 }
1281 }
1282
1283 void
1284 quit(const Arg *arg) {
1285 running = False;
1286 }
1287
1288 void
1289 resize(Client *c, int x, int y, int w, int h, Bool interact) {
1290 XWindowChanges wc;
1291
1292 if(applysizehints(c, &x, &y, &w, &h, interact)) {
1293 c->x = wc.x = x;
1294 c->y = wc.y = y;
1295 c->w = wc.width = w;
1296 c->h = wc.height = h;
1297 wc.border_width = c->bw;
1298 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1299 configure(c);
1300 XSync(dpy, False);
1301 }
1302 }
1303
1304 void
1305 resizemouse(const Arg *arg) {
1306 int ocx, ocy;
1307 int nw, nh;
1308 Client *c;
1309 Monitor *m;
1310 XEvent ev;
1311
1312 if(!(c = selmon->sel))
1313 return;
1314 restack(selmon);
1315 ocx = c->x;
1316 ocy = c->y;
1317 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1318 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1319 return;
1320 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1321 do {
1322 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1323 switch(ev.type) {
1324 case ConfigureRequest:
1325 case Expose:
1326 case MapRequest:
1327 handler[ev.type](&ev);
1328 break;
1329 case MotionNotify:
1330 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1331 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1332 if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
1333 && nh >= selmon->wy && nh <= selmon->wy + selmon->wh)
1334 {
1335 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1336 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1337 togglefloating(NULL);
1338 }
1339 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1340 resize(c, c->x, c->y, nw, nh, True);
1341 break;
1342 }
1343 } while(ev.type != ButtonRelease);
1344 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1345 XUngrabPointer(dpy, CurrentTime);
1346 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1347 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1348 sendmon(c, m);
1349 selmon = m;
1350 focus(NULL);
1351 }
1352 }
1353
1354 void
1355 restack(Monitor *m) {
1356 Client *c;
1357 XEvent ev;
1358 XWindowChanges wc;
1359
1360 drawbars();
1361 if(!m->sel)
1362 return;
1363 if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1364 XRaiseWindow(dpy, m->sel->win);
1365 if(m->lt[m->sellt]->arrange) {
1366 wc.stack_mode = Below;
1367 wc.sibling = m->barwin;
1368 for(c = m->stack; c; c = c->snext)
1369 if(!c->isfloating && ISVISIBLE(c)) {
1370 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1371 wc.sibling = c->win;
1372 }
1373 }
1374 XSync(dpy, False);
1375 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1376 }
1377
1378 void
1379 run(void) {
1380 XEvent ev;
1381
1382 /* main event loop */
1383 XSync(dpy, False);
1384 while(running && !XNextEvent(dpy, &ev))
1385 if(handler[ev.type])
1386 handler[ev.type](&ev); /* call handler */
1387 }
1388
1389 void
1390 scan(void) {
1391 unsigned int i, num;
1392 Window d1, d2, *wins = NULL;
1393 XWindowAttributes wa;
1394
1395 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1396 for(i = 0; i < num; i++) {
1397 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1398 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1399 continue;
1400 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1401 manage(wins[i], &wa);
1402 }
1403 for(i = 0; i < num; i++) { /* now the transients */
1404 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1405 continue;
1406 if(XGetTransientForHint(dpy, wins[i], &d1)
1407 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1408 manage(wins[i], &wa);
1409 }
1410 if(wins)
1411 XFree(wins);
1412 }
1413 }
1414
1415 void
1416 sendmon(Client *c, Monitor *m) {
1417 if(c->mon == m)
1418 return;
1419 unfocus(c);
1420 detach(c);
1421 detachstack(c);
1422 c->mon = m;
1423 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1424 attach(c);
1425 attachstack(c);
1426 focus(NULL);
1427 arrange();
1428 }
1429
1430 void
1431 setclientstate(Client *c, long state) {
1432 long data[] = { state, None };
1433
1434 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1435 PropModeReplace, (unsigned char *)data, 2);
1436 }
1437
1438 void
1439 setlayout(const Arg *arg) {
1440 if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1441 selmon->sellt ^= 1;
1442 if(arg && arg->v)
1443 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1444 if(selmon->sel)
1445 arrange();
1446 else
1447 drawbars();
1448 }
1449
1450 /* arg > 1.0 will set mfact absolutly */
1451 void
1452 setmfact(const Arg *arg) {
1453 float f;
1454
1455 if(!arg || !selmon->lt[selmon->sellt]->arrange)
1456 return;
1457 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1458 if(f < 0.1 || f > 0.9)
1459 return;
1460 selmon->mfact = f;
1461 arrange();
1462 }
1463
1464 void
1465 setup(void) {
1466 XSetWindowAttributes wa;
1467
1468 /* clean up any zombies immediately */
1469 sigchld(0);
1470
1471 /* init screen */
1472 screen = DefaultScreen(dpy);
1473 root = RootWindow(dpy, screen);
1474 initfont(font);
1475 sw = DisplayWidth(dpy, screen);
1476 sh = DisplayHeight(dpy, screen);
1477 bh = dc.h = dc.font.height + 2;
1478 updategeom();
1479 /* init atoms */
1480 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1481 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1482 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1483 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1484 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1485 /* init cursors */
1486 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1487 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1488 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1489 /* init appearance */
1490 dc.norm[ColBorder] = getcolor(normbordercolor);
1491 dc.norm[ColBG] = getcolor(normbgcolor);
1492 dc.norm[ColFG] = getcolor(normfgcolor);
1493 dc.sel[ColBorder] = getcolor(selbordercolor);
1494 dc.sel[ColBG] = getcolor(selbgcolor);
1495 dc.sel[ColFG] = getcolor(selfgcolor);
1496 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1497 dc.gc = XCreateGC(dpy, root, 0, NULL);
1498 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1499 if(!dc.font.set)
1500 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1501 /* init bars */
1502 updatebars();
1503 updatestatus();
1504 /* EWMH support per view */
1505 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1506 PropModeReplace, (unsigned char *) netatom, NetLast);
1507 /* select for events */
1508 wa.cursor = cursor[CurNormal];
1509 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1510 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1511 |PropertyChangeMask;
1512 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1513 XSelectInput(dpy, root, wa.event_mask);
1514 grabkeys();
1515 }
1516
1517 void
1518 showhide(Client *c) {
1519 if(!c)
1520 return;
1521 if(ISVISIBLE(c)) { /* show clients top down */
1522 XMoveWindow(dpy, c->win, c->x, c->y);
1523 if(!c->mon->lt[c->mon->sellt]->arrange || c->isfloating)
1524 resize(c, c->x, c->y, c->w, c->h, False);
1525 showhide(c->snext);
1526 }
1527 else { /* hide clients bottom up */
1528 showhide(c->snext);
1529 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1530 }
1531 }
1532
1533
1534 void
1535 sigchld(int unused) {
1536 if(signal(SIGCHLD, sigchld) == SIG_ERR)
1537 die("Can't install SIGCHLD handler");
1538 while(0 < waitpid(-1, NULL, WNOHANG));
1539 }
1540
1541 void
1542 spawn(const Arg *arg) {
1543 if(fork() == 0) {
1544 if(dpy)
1545 close(ConnectionNumber(dpy));
1546 setsid();
1547 execvp(((char **)arg->v)[0], (char **)arg->v);
1548 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1549 perror(" failed");
1550 exit(0);
1551 }
1552 }
1553
1554 void
1555 tag(const Arg *arg) {
1556 if(selmon->sel && arg->ui & TAGMASK) {
1557 selmon->sel->tags = arg->ui & TAGMASK;
1558 arrange();
1559 }
1560 }
1561
1562 void
1563 tagmon(const Arg *arg) {
1564 if(!selmon->sel || !mons->next)
1565 return;
1566 sendmon(selmon->sel, dirtomon(arg->i));
1567 }
1568
1569 int
1570 textnw(const char *text, unsigned int len) {
1571 XRectangle r;
1572
1573 if(dc.font.set) {
1574 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1575 return r.width;
1576 }
1577 return XTextWidth(dc.font.xfont, text, len);
1578 }
1579
1580 void
1581 tile(Monitor *m) {
1582 int x, y, h, w, mw;
1583 unsigned int i, n;
1584 Client *c;
1585
1586 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1587 if(n == 0)
1588 return;
1589 /* master */
1590 c = nexttiled(m->clients);
1591 mw = m->mfact * m->ww;
1592 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw, False);
1593 if(--n == 0)
1594 return;
1595 /* tile stack */
1596 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1597 y = m->wy;
1598 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1599 h = m->wh / n;
1600 if(h < bh)
1601 h = m->wh;
1602 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1603 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1604 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw), False);
1605 if(h != m->wh)
1606 y = c->y + HEIGHT(c);
1607 }
1608 }
1609
1610 void
1611 togglebar(const Arg *arg) {
1612 selmon->showbar = !selmon->showbar;
1613 updatebarpos(selmon);
1614 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1615 arrange();
1616 }
1617
1618 void
1619 togglefloating(const Arg *arg) {
1620 if(!selmon->sel)
1621 return;
1622 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1623 if(selmon->sel->isfloating)
1624 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1625 selmon->sel->w, selmon->sel->h, False);
1626 arrange();
1627 }
1628
1629 void
1630 toggletag(const Arg *arg) {
1631 unsigned int newtags;
1632
1633 if(!selmon->sel)
1634 return;
1635 newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1636 if(newtags) {
1637 selmon->sel->tags = newtags;
1638 arrange();
1639 }
1640 }
1641
1642 void
1643 toggleview(const Arg *arg) {
1644 unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1645
1646 if(newtagset) {
1647 selmon->tagset[selmon->seltags] = newtagset;
1648 arrange();
1649 }
1650 }
1651
1652 void
1653 unfocus(Client *c) {
1654 if(!c)
1655 return;
1656 grabbuttons(c, False);
1657 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1658 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1659 }
1660
1661 void
1662 unmanage(Client *c, Bool destroyed) {
1663 XWindowChanges wc;
1664
1665 /* The server grab construct avoids race conditions. */
1666 detach(c);
1667 detachstack(c);
1668 if(!destroyed) {
1669 wc.border_width = c->oldbw;
1670 XGrabServer(dpy);
1671 XSetErrorHandler(xerrordummy);
1672 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1673 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1674 setclientstate(c, WithdrawnState);
1675 XSync(dpy, False);
1676 XSetErrorHandler(xerror);
1677 XUngrabServer(dpy);
1678 }
1679 free(c);
1680 focus(NULL);
1681 arrange();
1682 }
1683
1684 void
1685 unmapnotify(XEvent *e) {
1686 Client *c;
1687 XUnmapEvent *ev = &e->xunmap;
1688
1689 if((c = wintoclient(ev->window)))
1690 unmanage(c, False);
1691 }
1692
1693 void
1694 updatebars(void) {
1695 Monitor *m;
1696 XSetWindowAttributes wa;
1697
1698 wa.override_redirect = True;
1699 wa.background_pixmap = ParentRelative;
1700 wa.event_mask = ButtonPressMask|ExposureMask;
1701 for(m = mons; m; m = m->next) {
1702 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1703 CopyFromParent, DefaultVisual(dpy, screen),
1704 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1705 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1706 XMapRaised(dpy, m->barwin);
1707 }
1708 }
1709
1710 void
1711 updatebarpos(Monitor *m) {
1712 m->wy = m->my;
1713 m->wh = m->mh;
1714 if(m->showbar) {
1715 m->wh -= bh;
1716 m->by = m->topbar ? m->wy : m->wy + m->wh;
1717 m->wy = m->topbar ? m->wy + bh : m->wy;
1718 }
1719 else
1720 m->by = -bh;
1721 }
1722
1723 Bool
1724 updategeom(void) {
1725 Bool dirty = False;
1726
1727 #ifdef XINERAMA
1728 if(XineramaIsActive(dpy)) {
1729 int i, j, n, nn;
1730 Monitor *m;
1731 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
1732 XineramaScreenInfo *unique = NULL;
1733
1734 info = XineramaQueryScreens(dpy, &nn);
1735 for(n = 0, m = mons; m; m = m->next, n++);
1736 /* only consider unique geometries as separate screens */
1737 if(!(unique = (XineramaScreenInfo *)malloc(sizeof(XineramaScreenInfo) * nn)))
1738 die("fatal: could not malloc() %u bytes\n", sizeof(XineramaScreenInfo) * nn);
1739 for(i = 0, j = 0; i < nn; i++)
1740 if(isuniquegeom(unique, j, &info[i]))
1741 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
1742 XFree(info);
1743 nn = j;
1744 if(n <= nn) {
1745 for(i = 0; i < (nn - n); i++) { /* new monitors available */
1746 for(m = mons; m && m->next; m = m->next);
1747 if(m)
1748 m->next = createmon();
1749 else
1750 mons = createmon();
1751 }
1752 for(i = 0, m = mons; i < nn && m; m = m->next, i++)
1753 if(i >= n
1754 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
1755 || unique[i].width != m->mw || unique[i].height != m->mh))
1756 {
1757 dirty = True;
1758 m->num = unique[i].screen_number;
1759 m->mx = m->wx = unique[i].x_org;
1760 m->my = m->wy = unique[i].y_org;
1761 m->mw = m->ww = unique[i].width;
1762 m->mh = m->wh = unique[i].height;
1763 updatebarpos(m);
1764 }
1765 }
1766 else { /* less monitors available */
1767 cleanup();
1768 setup();
1769 scan();
1770 }
1771 free(unique);
1772 }
1773 else
1774 #endif /* XINERAMA */
1775 /* default monitor setup */
1776 {
1777 if(!mons)
1778 mons = createmon();
1779 if(mons->mw != sw || mons->mh != sh) {
1780 dirty = True;
1781 mons->mw = mons->ww = sw;
1782 mons->mh = mons->wh = sh;
1783 updatebarpos(mons);
1784 }
1785 }
1786 if(dirty) {
1787 selmon = mons;
1788 selmon = wintomon(root);
1789 }
1790 return dirty;
1791 }
1792
1793 void
1794 updatenumlockmask(void) {
1795 unsigned int i, j;
1796 XModifierKeymap *modmap;
1797
1798 numlockmask = 0;
1799 modmap = XGetModifierMapping(dpy);
1800 for(i = 0; i < 8; i++)
1801 for(j = 0; j < modmap->max_keypermod; j++)
1802 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1803 == XKeysymToKeycode(dpy, XK_Num_Lock))
1804 numlockmask = (1 << i);
1805 XFreeModifiermap(modmap);
1806 }
1807
1808 void
1809 updatesizehints(Client *c) {
1810 long msize;
1811 XSizeHints size;
1812
1813 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1814 /* size is uninitialized, ensure that size.flags aren't used */
1815 size.flags = PSize;
1816 if(size.flags & PBaseSize) {
1817 c->basew = size.base_width;
1818 c->baseh = size.base_height;
1819 }
1820 else if(size.flags & PMinSize) {
1821 c->basew = size.min_width;
1822 c->baseh = size.min_height;
1823 }
1824 else
1825 c->basew = c->baseh = 0;
1826 if(size.flags & PResizeInc) {
1827 c->incw = size.width_inc;
1828 c->inch = size.height_inc;
1829 }
1830 else
1831 c->incw = c->inch = 0;
1832 if(size.flags & PMaxSize) {
1833 c->maxw = size.max_width;
1834 c->maxh = size.max_height;
1835 }
1836 else
1837 c->maxw = c->maxh = 0;
1838 if(size.flags & PMinSize) {
1839 c->minw = size.min_width;
1840 c->minh = size.min_height;
1841 }
1842 else if(size.flags & PBaseSize) {
1843 c->minw = size.base_width;
1844 c->minh = size.base_height;
1845 }
1846 else
1847 c->minw = c->minh = 0;
1848 if(size.flags & PAspect) {
1849 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1850 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1851 }
1852 else
1853 c->maxa = c->mina = 0.0;
1854 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1855 && c->maxw == c->minw && c->maxh == c->minh);
1856 }
1857
1858 void
1859 updatetitle(Client *c) {
1860 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1861 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1862 if(c->name[0] == '\0') /* hack to mark broken clients */
1863 strcpy(c->name, broken);
1864 }
1865
1866 void
1867 updatestatus(void) {
1868 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1869 strcpy(stext, "dwm-"VERSION);
1870 drawbar(selmon);
1871 }
1872
1873 void
1874 updatewmhints(Client *c) {
1875 XWMHints *wmh;
1876
1877 if((wmh = XGetWMHints(dpy, c->win))) {
1878 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1879 wmh->flags &= ~XUrgencyHint;
1880 XSetWMHints(dpy, c->win, wmh);
1881 }
1882 else
1883 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1884 XFree(wmh);
1885 }
1886 }
1887
1888 void
1889 view(const Arg *arg) {
1890 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1891 return;
1892 selmon->seltags ^= 1; /* toggle sel tagset */
1893 if(arg->ui & TAGMASK)
1894 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1895 arrange();
1896 }
1897
1898 Client *
1899 wintoclient(Window w) {
1900 Client *c;
1901 Monitor *m;
1902
1903 for(m = mons; m; m = m->next)
1904 for(c = m->clients; c; c = c->next)
1905 if(c->win == w)
1906 return c;
1907 return NULL;
1908 }
1909
1910 Monitor *
1911 wintomon(Window w) {
1912 int x, y;
1913 Client *c;
1914 Monitor *m;
1915
1916 if(w == root && getrootptr(&x, &y))
1917 return ptrtomon(x, y);
1918 for(m = mons; m; m = m->next)
1919 if(w == m->barwin)
1920 return m;
1921 if((c = wintoclient(w)))
1922 return c->mon;
1923 return selmon;
1924 }
1925
1926 /* There's no way to check accesses to destroyed windows, thus those cases are
1927 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1928 * default error handler, which may call exit. */
1929 int
1930 xerror(Display *dpy, XErrorEvent *ee) {
1931 if(ee->error_code == BadWindow
1932 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1933 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1934 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1935 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1936 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1937 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1938 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1939 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1940 return 0;
1941 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1942 ee->request_code, ee->error_code);
1943 return xerrorxlib(dpy, ee); /* may call exit */
1944 }
1945
1946 int
1947 xerrordummy(Display *dpy, XErrorEvent *ee) {
1948 return 0;
1949 }
1950
1951 /* Startup Error handler to check if another window manager
1952 * is already running. */
1953 int
1954 xerrorstart(Display *dpy, XErrorEvent *ee) {
1955 otherwm = True;
1956 return -1;
1957 }
1958
1959 void
1960 zoom(const Arg *arg) {
1961 Client *c = selmon->sel;
1962
1963 if(!selmon->lt[selmon->sellt]->arrange
1964 || selmon->lt[selmon->sellt]->arrange == monocle
1965 || (selmon->sel && selmon->sel->isfloating))
1966 return;
1967 if(c == nexttiled(selmon->clients))
1968 if(!c || !(c = nexttiled(c->next)))
1969 return;
1970 detach(c);
1971 attach(c);
1972 focus(c);
1973 arrange();
1974 }
1975
1976 int
1977 main(int argc, char *argv[]) {
1978 if(argc == 2 && !strcmp("-v", argv[1]))
1979 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1980 else if(argc != 1)
1981 die("usage: dwm [-v]\n");
1982 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1983 fputs("warning: no locale support\n", stderr);
1984 if(!(dpy = XOpenDisplay(NULL)))
1985 die("dwm: cannot open display\n");
1986 checkotherwm();
1987 setup();
1988 scan();
1989 run();
1990 cleanup();
1991 XCloseDisplay(dpy);
1992 return 0;
1993 }